Polity IV Project:
Political Regime Characteristics
and Transitions, 1800-2013

Monty G. Marshall, Director

Monty G. Marshall, Principal Investigator
Societal-Systems Research Inc.
Ted Robert Gurr, Founder
University of Maryland (Emeritus)

Polity IV Individual Country Regime Trends, 1946-2013
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Annual Polity scores have been plotted for each of the 167 countries currently covered by the Polity IV data series for the period 1946-2013 (trend graphs are also included with the Polity IV 2010 Country Reports). This version of the Polity Country Trend graphs display periods of "factionalism" and important Polity change events, including autocratic backsliding, executive auto-coup or autogolpe​, revolution, collapse of central authority (state failure), and successful military coups. Click on the country of interest in the "Regimes by Type 2013" map directly below (or table following) to view that country's contemporary regime trend (click here for a explanatory guide to the Polity Country Trend graphs).

Polity IV Individual Country Regime Trends, 1946-2013
Click here to view Legend Key for Trends Graphs

* The research described in the Polity IV Project was sponsored by the Political Instability Task Force (PITF).
The PITF is funded by the Central Intelligence Agency. The views expressed herein are the author's/authors' alone and do not
represent the views of the US Government.

Last updated on June 6, 2014
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